Triquetral bone

From WikiMD's Wellness Encyclopedia

(Redirected from Triquetrous)

Triangular bone (left hand) - animation01
Triangular bone (left hand) - animation02
Triquetral bone
RightHumanPosteriorDistalRadiusUlnaCarpals - Triquetral bone
RightHumanAnteriorDistalRadiusUlnaCarpals - Triquetral bone
Gray's anatomy image 219 - Triangular bone
Triquetral bone
File:Triquetrum bone (left hand) 01 palmar view.png
Left hand anterior view (palmar view). Triquetral bone shown in red.
File:Triquetrum bone (left hand) 02 dorsal view.png
Left hand posterior view (dorsal view). Triquetral bone shown in red.
Details
ArticulationsLunate bone, Pisiform bone, Hamate bone
Identifiers
LatinOs triquetrum
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Anatomical terms of bone
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The triquetral bone, also known as the triquetrum, triangular bone, or cuneiform bone, is one of the eight carpal bones of the wrist. It is situated on the medial side of the proximal row of the carpus, between the lunate bone and the pisiform bone.

Anatomy[edit | edit source]

The triquetral bone is a three-sided bone that articulates with three other carpal bones: the lunate bone, the pisiform bone, and the hamate bone. It is located in the proximal row of the carpus, which is the row closest to the forearm. The bone has a pyramidal shape and is characterized by its three distinct surfaces.

Surfaces[edit | edit source]

Function[edit | edit source]

The triquetral bone plays a crucial role in the complex movements of the wrist. It contributes to the stability and flexibility of the wrist joint, allowing for a wide range of motion. The bone also serves as an attachment point for various ligaments that support the wrist.

Clinical Significance[edit | edit source]

Injuries to the triquetral bone are relatively uncommon but can occur due to trauma, such as a fall on an outstretched hand. Fractures of the triquetral bone can lead to pain, swelling, and limited motion in the wrist. Diagnosis is typically confirmed through imaging studies such as X-rays or MRI.

Related Pages[edit | edit source]




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Contributors: Prab R. Tumpati, MD